[LinuxBIOS] [PATCH] Initial support for the ASI/BCom MB-5BLMP / IGEL Winnet III

popkonserve popkonserve at gmx.de
Sun May 13 10:42:16 CEST 2007


>>Geode GX1: IO Recovery Time is 6 clocks
> Can anyone interpret this value? Does it mean "Recovery on PCI bus" side? The 
> GX1 processor only has a PCI bus, nothing else.

yes, i can :)

Quote from: "Cyrix MediaGX Databook, October 29, 1998 - Revision 2.0,
Cyrix Corporation"

"3.4.1 I/O Address Space
The CPU I/O address space is accessed using IN and OUT instructions to
addresses referred to as “ports.” The accessible I/O address space is
64KB and can be accessed as 8-bit, 16-bit or 32-bit ports.
The MediaGX processor configuration registers reside within the I/O
address space at port addresses 22h and 23h and are accessed using
the standard IN and OUT instructions."

Index E8h : CCR4
"2:0 IORT(2:0) I/O Recovery Time: Specifies the minimum number of bus
clocks between I/O accesses:
000 = No clock delay 100 = 16-clock delay
001 = 2-clock delay 101 = 32-clock delay (default value after reset)
010 = 4-clock delay 110 = 64-clock delay
011 = 8-clock delay 111 = 128-clock delay
Cleared to 0 at reset."





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